This is of course an easy fix, just put the width below 102. But why is this an issue at all?
At least, I feel this warning shouldn't come up before you go over 180
I assume "width" means the angle of the cone, which should be able to go up to 180 degrees, making a half-dome of light.
But for some reason, the developers doesn't want it higher than 102 (.3!?!)

#2:

Need to rebuild map to get bumped lighting on xxxxxxxxxx

I have a material using some standard Valve textures, but with a custom VMT.
It is basically a variation of one of the blend textures for dirt and grass.